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authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-12-15 00:04:32 +0000
committerblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-12-15 00:04:32 +0000
commit345bce368bc47c80003442a3f7c82181ddee7e42 (patch)
tree500dfa4593a960e3e1a43dff52513d6008a89a5f /target/linux/danube/files/drivers/char
parent268d096b51e8650df8217bad04b7cdce47cd552b (diff)
danube eeprom cleanup
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9762 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/danube/files/drivers/char')
-rw-r--r--target/linux/danube/files/drivers/char/danube_eeprom.c97
1 files changed, 21 insertions, 76 deletions
diff --git a/target/linux/danube/files/drivers/char/danube_eeprom.c b/target/linux/danube/files/drivers/char/danube_eeprom.c
index db0f61037..1835f2776 100644
--- a/target/linux/danube/files/drivers/char/danube_eeprom.c
+++ b/target/linux/danube/files/drivers/char/danube_eeprom.c
@@ -61,15 +61,6 @@
/* allow the user to set the major device number */
static int danube_eeprom_maj = 0;
-static ssize_t danube_eeprom_fops_read (struct file *, char *, size_t, loff_t *);
-static ssize_t danube_eeprom_fops_write (struct file *, const char *, size_t,
- loff_t *);
-static int danube_eeprom_ioctl (struct inode *, struct file *, unsigned int,
- unsigned long);
-static int danube_eeprom_open (struct inode *, struct file *);
-static int danube_eeprom_close (struct inode *, struct file *);
-
-//ifx_ssc.c
extern int ifx_ssc_init (void);
extern int ifx_ssc_open (struct inode *inode, struct file *filp);
extern int ifx_ssc_close (struct inode *inode, struct file *filp);
@@ -98,63 +89,30 @@ extern int ifx_ssc_rx (char *rx_buf, unsigned int rx_len);
#define EEPROM_SIZE 512
static int
-eeprom_rdsr (char *status)
+eeprom_rdsr (void)
{
int ret = 0;
unsigned char cmd = EEPROM_RDSR;
unsigned long flag;
+ char status;
local_irq_save(flag);
- if ((ret = ifx_ssc_cs_low (EEPROM_CS)))
- {
- local_irq_restore(flag);
- goto out;
- }
-
- if ((ret = ifx_ssc_txrx (&cmd, 1, status, 1)) < 0)
- {
- ifx_ssc_cs_high(EEPROM_CS);
- local_irq_restore(flag);
- goto out;
- }
-
- if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
- {
- local_irq_restore(flag);
- goto out;
- }
+ if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+ if ((ret = ifx_ssc_txrx(&cmd, 1, &status, 1)) >= 0)
+ ret = status & 1;
+ ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
-out:
return ret;
}
-static inline int
+void
eeprom_wip_over (void)
{
- int ret = 0;
- unsigned char status;
-
- while (1)
- {
- ret = eeprom_rdsr(&status);
- printk("status %x \n", status);
-
- if (ret)
- {
- printk("read back status fails %d\n", ret);
- break;
- }
-
- if (((status) & 1) != 0)
- printk("read back status not zero %x\n", status);
- else
- break;
- }
-
- return ret;
+ while (eeprom_rdsr())
+ printk("waiting for eeprom\n");
}
static int
@@ -165,29 +123,16 @@ eeprom_wren (void)
unsigned long flag;
local_irq_save(flag);
- if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
- {
- local_irq_restore(flag);
- goto out;
- }
-
- if ((ret = ifx_ssc_tx(&cmd, 1)) < 0)
- {
- ifx_ssc_cs_high(EEPROM_CS);
- local_irq_restore(flag);
- goto out;
- }
-
- if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
- {
- local_irq_restore(flag);
- goto out;
- }
+ if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+ if ((ret = ifx_ssc_tx(&cmd, 1)) >= 0)
+ ret = 0;
+ ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
- eeprom_wip_over();
-out:
+ if (!ret)
+ eeprom_wip_over();
+
return ret;
}
@@ -388,7 +333,7 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
len = EEPROM_SIZE / 2;
}
- if ((ret = ifx_ssc_open ((struct inode *) 0, NULL)))
+ if ((ret = ifx_ssc_open((struct inode *) 0, NULL)))
{
printk("danube_eeprom_open fails\n");
goto out;
@@ -396,26 +341,26 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
data = (unsigned int)IFX_SSC_MODE_RXTX;
- if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
+ if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
{
printk("set RXTX mode fails\n");
goto out;
}
- if ((ret = eeprom_wrsr ()))
+ if ((ret = eeprom_wrsr()))
{
printk("EEPROM reset fails\n");
goto out;
}
- if ((ret = eeprom_read (addr, buf, len)))
+ if ((ret = eeprom_read(addr, buf, len)))
{
printk("eeprom read fails\n");
goto out;
}
out:
- if (ifx_ssc_close ((struct inode *) 0, NULL))
+ if (ifx_ssc_close((struct inode *) 0, NULL))
printk("danube_eeprom_close fails\n");
return len;